555
FNCA52 TJSJ 160730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST THU JUL 16 2026
DISCUSSION
ELEVATED FIRE WEATHER CONDITIONS ARE EXPECTED TO PERSIST ACROSS
PORTIONS OF PUERTO RICO TODAY, PARTICULARLY ACROSS THE SOUTHERN
COASTAL PLAINS. ALTHOUGH LOW-LEVEL MOISTURE IS FORECAST TO
GRADUALLY INCREASE LATER TODAY AS A WEAK TRADE WIND PERTURBATION
MOVES ACROSS THE REGION, RELATIVE HUMIDITY VALUES ARE STILL
EXPECTED TO FALL TO CRITICAL LEVELS BY LATE MORNING AND AROUND
MIDDAY BEFORE THE DEEPER MOISTURE ARRIVES. BREEZY EASTERLY WINDS
WILL PERSIST, WITH SUSTAINED SPEEDS OF 10 TO 20 MPH AND HIGHER
GUSTS, PROMOTING FAVORABLE CONDITIONS FOR RAPID FIRE SPREAD.
RECENT OBSERVATIONS INDICATE THAT MOST RAWS STATIONS CONTINUE TO
REPORT KEETCH-BYRAM DROUGHT INDEX (KBDI) VALUES ABOVE 700, WHILE
30- DAY RAINFALL PERCENTAGES REMAIN WELL BELOW NORMAL, GENERALLY
LESS THAN 10 PERCENT AND LOCALLY BELOW 5 PERCENT ACROSS THE
SOUTHERN COASTAL PLAINS. THESE CRITICALLY DRY FUELS, COMBINED
WITH LOW RELATIVE HUMIDITY AND BREEZY CONDITIONS, WILL CONTINUE
TO SUPPORT AN ELEVATED FIRE DANGER RISK. CONSEQUENTLY, ANOTHER
FIRE DANGER STATEMENT (RFD) WILL BE ISSUED TODAY, PRIMARILY FOR
THE SOUTHERN COASTAL PLAINS OF PUERTO RICO, WHERE THE POTENTIAL
FOR RAPID FIRE GROWTH WILL REMAIN THE GREATEST.
PRZ014-162000-
SOUTHEAST COASTAL PLAINS-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 20
TEMP (24H TREND) 93 (+1) 74 (-2) 92
RH % (24H TREND) 45 (-2) 84 (+4) 47
WIND 20FT/EARLY(MPH) E 13 G21 E 13 E 14 G22
WIND 20FT/LATE(MPH) E 18 G26 E 11 E 14 G22
MIXING HGT(FT-AGL/MSL)5650 5680
TRANSPORT WND (MPH) E 20 E 18
VENT RATE (KT-FT) 96050 90880
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-162000-
SOUTHERN HILLS-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 20
TEMP (24H TREND) 89 (+2) 70 (-3) 90
RH % (24H TREND) 56 (-3) 95 (+5) 55
WIND 20FT/EARLY(MPH) E 12 E 13 E 13
WIND 20FT/LATE(MPH) E 16 E 12 E 13
MIXING HGT(FT-AGL/MSL)6310 6600
TRANSPORT WND (MPH) E 17 E 17
VENT RATE (KT-FT) 94650 99000
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-162000-
NORTH COASTAL PLAINS-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 40
TEMP (24H TREND) 91 (+1) 73 (-3) 91
RH % (24H TREND) 59 (-4) 95 (+4) 57
WIND 20FT/EARLY(MPH) E 16 E 20 E 14
WIND 20FT/LATE(MPH) E 24 E 12 E 23
MIXING HGT(FT-AGL/MSL)5250 6160
TRANSPORT WND (MPH) E 17 E 16
VENT RATE (KT-FT) 78750 86240
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-162000-
NORTHERN HILLS-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 50
TEMP (24H TREND) 90 (+1) 71 (-2) 90
RH % (24H TREND) 58 (-3) 97 (+2) 57
WIND 20FT/EARLY(MPH) E 14 E 18 E 12
WIND 20FT/LATE(MPH) E 20 E 9 E 18
MIXING HGT(FT-AGL/MSL)6470 7330
TRANSPORT WND (MPH) E 15 E 14
VENT RATE (KT-FT) 84110 87960
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-162000-
WEST COAST-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 60 60 30
TEMP (24H TREND) 93 (+1) 73 (-1) 94
RH % (24H TREND) 55 (-5) 97 (+4) 55
WIND 20FT/EARLY(MPH) E 13 E 12 E 14
WIND 20FT/LATE(MPH) E 16 E 12 E 14
MIXING HGT(FT-AGL/MSL)5390 5210
TRANSPORT WND (MPH) E 12 E 13
VENT RATE (KT-FT) 53900 57310
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-162000-
EASTERN INTERIOR-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 30
TEMP (24H TREND) 89 (+1) 72 (-3) 90
RH % (24H TREND) 58 (-2) 96 (+4) 56
WIND 20FT/EARLY(MPH) E 12 E 14 E 14
WIND 20FT/LATE(MPH) E 14 E 14 E 14
MIXING HGT(FT-AGL/MSL)6810 7100
TRANSPORT WND (MPH) E 17 E 17
VENT RATE (KT-FT) 102150 106500
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-162000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 50
TEMP (24H TREND) 84 (+3) 69 (-3) 86
RH % (24H TREND) 67 (-5) 100 (+5) 64
WIND 20FT/EARLY(MPH) E 11 E 12 E 13
WIND 20FT/LATE(MPH) E 12 E 11 E 13
MIXING HGT(FT-AGL/MSL)4800 4820
TRANSPORT WND (MPH) E 17 E 20
VENT RATE (KT-FT) 72000 81940
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-162000-
CENTRAL MOUNTAIN RANGE-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 60 50 30
TEMP (24H TREND) 88 (+3) 67 (-4) 89
RH % (24H TREND) 60 (-4) 98 (+3) 59
WIND 20FT/EARLY(MPH) E 10 E 11 E 10
WIND 20FT/LATE(MPH) E 12 E 8 E 11
MIXING HGT(FT-AGL/MSL)8090 7940
TRANSPORT WND (MPH) E 12 SE 12
VENT RATE (KT-FT) 80900 79400
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-162000-
CAYEY MOUNTAIN RANGE-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 40 30
TEMP (24H TREND) 85 (+2) 70 (-2) 85
RH % (24H TREND) 65 (-1) 99 (+2) 63
WIND 20FT/EARLY(MPH) E 11 E 11 E 12
WIND 20FT/LATE(MPH) E 13 E 11 E 12
MIXING HGT(FT-AGL/MSL)5680 5900
TRANSPORT WND (MPH) E 18 E 18
VENT RATE (KT-FT) 90880 94400
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-162000-
VIEQUES-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 50 40
TEMP (24H TREND) 89 (+1) 77 (-2) 90
RH % (24H TREND) 59 (-2) 86 (+2) 55
WIND 20FT/EARLY(MPH) E 16 E 17 E 17
WIND 20FT/LATE(MPH) E 16 E 17 E 16
MIXING HGT(FT-AGL/MSL)3820 3490
TRANSPORT WND (MPH) E 18 E 21
VENT RATE (KT-FT) 61120 62820
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-162000-
CULEBRA-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 30 40
TEMP (24H TREND) 90 (+2) 78 (-1) 91
RH % (24H TREND) 60 (-5) 89 (+5) 58
WIND 20FT/EARLY(MPH) E 16 E 17 E 16
WIND 20FT/LATE(MPH) E 16 E 17 E 16
MIXING HGT(FT-AGL/MSL)3660 3410
TRANSPORT WND (MPH) E 18 E 21
VENT RATE (KT-FT) 58560 61380
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-162000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 30 20
TEMP (24H TREND) 93 (+2) 74 (-2) 94
RH % (24H TREND) 46 (-4) 87 (+9) 47
WIND 20FT/EARLY(MPH) E 16 G23 E 16 E 17 G25
WIND 20FT/LATE(MPH) SE 19 G28 E 16 SE 18 G26
MIXING HGT(FT-AGL/MSL)5220 5360
TRANSPORT WND (MPH) E 18 E 21
VENT RATE (KT-FT) 83520 96480
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-162000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 30
TEMP (24H TREND) 88 (+2) 77 (-2) 86
RH % (24H TREND) 63 (-4) 90 (+6) 64
WIND 20FT/EARLY(MPH) E 16 E 18 E 17
WIND 20FT/LATE(MPH) E 16 E 17 E 16
MIXING HGT(FT-AGL/MSL)3530 3350
TRANSPORT WND (MPH) E 17 E 21
VENT RATE (KT-FT) 52950 60300
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-162000-
ST CROIX-
330 AM AST THU JUL 16 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 10 20
TEMP (24H TREND) 89 (+2) 77 (-2) 90
RH % (24H TREND) 63 (-4) 89 (+3) 59
WIND 20FT/EARLY(MPH) E 16 E 16 E 17
WIND 20FT/LATE(MPH) E 16 E 17 E 16
MIXING HGT(FT-AGL/MSL)4960 5150
TRANSPORT WND (MPH) E 21 E 23
VENT RATE (KT-FT) 89280 103000
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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